I have a number of UDP packets that are using a protocol that is not implemented in wireshark. I would like to use the I/O graph to plot the value of the data packet byte at index 3. Is this possible?

I have tried setting up a plot with Y Axis = SUM and Y Field = data[3] however this does not seem to work.

  • Have you tried udp[3]?
    – Zac67
    Apr 30, 2020 at 15:12
  • Did any answer help you? If so, you should accept the answer so that the question doesn't keep popping up forever, looking for an answer. Alternatively, you can post and accept your own answer.
    – Ron Maupin
    Dec 17, 2020 at 17:17

1 Answer 1


You can create a filter on your graph and setup with a dot.enter image description here

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